5
					2	1
		4	7
	3					4
	5					3
				1	7
	4	5
	6

Difficulty: Very easy (0)

	6	4				7
							8
2		7				3	5
		6
					7
7	2				5		6
1
	5				1	2

Difficulty: Very easy (0)

				3
		6		5
							5
	3			7		2
	2		8			3
5
			4		7
			1

Difficulty: Easy (0)

						3
						7
	7		4
1	5			2
			5			4	1
				5		6
	6
	2

Difficulty: Medium (0)